bug#18094: 24.4.50; emacs_backtrace.txt

[Drew Adams]

> This is not relevant to the issue at hand.  The assertion violation
> you've hit means that the base face of the mode line (known as
> 'mode-line') is somehow invalid.  Any additional faces you add to the
> strings displayed on the mode line are irrelevant.
> 
> Do you have any face remappings for the mode-line face itself?

Nope.